Prestressed Glass Fiber Reinforced Concrete Flexural Members Mechanical Properties And Bearing Capacity Of Normal Section

With the national economic development, the status of roads and bridges projects in infrastructure construction becomes more and more important. The bridge has become the hub of transportation. In 21st century, the development direction of the bridge-building are the higher performance, greater span and more advanced design Means and construction technology and the variety development and application of new materials. Especially, new materials research has become a hot issue in structural engineering.Prestressed concrete technology has been generally used in bridge construction, if the physical and mechanical properties of concrete can be improved through added high-performance composite materials, it will be another leap of bridge engineering. At present, steel fiber reinforced concrete has been used in structural engineering. The researching of other composite materials is not yet widespread, especially for glass fiber. However, the glass fiber has superior physical and mechanical properties. It should have broad application prospects.In this paper, concrete properties of compressive strength, tensile strength, elastic modulus, Poisson and the normal cross-section bearing capacity of prestressed glass fiber reinforced concrete beams mixing different content of glass fiber have been studied though experimental means. The selection method of these Mechanics Indicators has been derived. the formula of the bearing capacity of cross-section bending members has been derivated, and it has been proves by test results. These studying results will promote a theoretical foundation for the use of glass fiber and the establishment of related technical standards.the study shows that it can be contribute to enhance the strength of concrete, to improve the mechanical properties of concrete, improve flexural capacity to prevent and delay the occurrence of cracks, improve beam toughness, save steel, reducing the section size and reduce costs by adding an appropriate amount of glass fiber in concrete.